<div class="item_certificate" style="position:relative"> 
	<div class="certificate_mac">|:mark:mac_address:|</div>
	<div class="certificate_infomation">|:mark:infomation:|</div>
	<div class="certificate_tools" style="position:relative"><a href="#" onclick = "removeCertificate('|:mark:mac_address:|',this.offsetParent.offsetParent);">remove</a></div>
	<br class="clear"/>
</div>